Electric motor and pump.



W.v R. MACDONALD( A ELEQTRIO MOTOR AND PUMP.

APPLIUATIOI FILED JAN. 15, 19.12,.

1,066,635, 'Patented July 8,1913.

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www@ l MAM Errea/#Em W. R. MACDONALD.

ELBGTBIG MOTOR .AND PUMP. APPLICATION FILED JAN. 15, 1912.

1,066,635. Patented July 8, 19.13.

2 SHEETS-SHEET 2.

v1/avro@ A frown/Ens water if so desired, andit has for rangement that is WILLIAM RIGHARD MACDONALD, 0F PORTLAND PLACE, LONDON, ENGLAND.

ELECTRIC Moron AND PUMP.

Specification of Letters Patent.

Patented July 8, 1913.

Application .filed January 15, 1912. Serial No. 671,257.`

This invention relates to combined electric motors and pumps,adapted to be used under its object to provide improved arrangements and combiiiations of lparts as hereinafter more vparticularly described tending to greater simplification of construction and compactness.

In the accompanying drawings Figure 1 is a longitudinal section of part of one form of combined motor and pump according to the invention. Fig. 2 is a longitudinal-section and Fig. 3 an end elevation of another form.

As shown in Fig. 1, two armature cores 1 provided with conductors 2, and` together constituting a divided squirrel cage rotor, are mounted in separated relationsliipupon a hollow shaft-3 of large diameter.- This shaft forms part'of the pump, being fasliioned intermediateof its length as a centrifdisi The i ugal impeller that is to say withV blades 4 posed between disk like portions 5.

pump is completed by a delivery chamber whichmay conveniently be formed by expanding at 6 field core parts 8I associated with the rotor parts 1. 8a are the stator windings.` To preventpassage of liquid from the pump laterally outward linto the motor' the delivery chamber may partition walls 9v making joint with 'shoulders 10 upon the impeller. Topermit liquid to flow into "the motor for cooling purposes,

lby-passes 11 may be provided leading from the delivery chamber to channels 12 in the stator parts 8 means such as gauze at 13 being provided if necessary to prevent solid matter following the same path. -14 are 'bearings for the combined motor rotor and impeller. If desired gauze in ay be provided, as shown zit-15, to prevent ingress of solid matter to the pump. Although in this example each rotor partl is shown as provided with separate conductors 2, it will vbe understood that one set of conductors might be employed commonv to both and, extending through. the impeller and it is such an arillustrated in Figs. 2 and 3. In this case ltwo armature `core parts 16 the casing 7 for two stator or be 'formed or provided withare carried by a spider 17 that is secured i upon asolid shaft 18, the liquidbeing supplied to the impeller through the saidspider. The conductors 19 extend across the gap between the two core parts 16 as shown. The impeller blades 20 secured to the spider are of truncated triangular shape and the walls 21a extending from the delivery chamber 21 are inclined to correspond. The motor casing 7 is closed at its ends by, plates 22, openings at 23 therein serving to admit liquid to the spiden If the combined pump and motor is immersed these inlet openings will be suicient but if the pump is intended to draw liquid from a depth, pipes, such as shownat 24, will be required. As before, means such as gauze will be provided as and where required to preventingress of solids, a sheet of gauze being shown at 25 at each end of the casing, as protecting all inlets to the pump, while gauze at 26, making a close but rubbing joint with the spider -17 `may serve to prevent solid matter gaining access to the motor without however preventingit passing through .the pump. The arms 27 of the spider 17, constituting between them the liquid conveying passages, may be formed in such a mani-ier `as to drawin liquid from the ends, the shade lines in Fig. 2 representing the extremities as being curved for this purpose.

What I claim is 1. In combination, an electric motor comprising longitudinally separated stator and rotor parts, a centrifugal pump intermediate of said parts, and a casing, forming part of they pump, inclosing all the substantially as described.

2. In combination, an electric motor rotor, a pump impeller intermediate ofthe length of said rotor, a motor stator divided into two axially separated portions, a delivery chamber between such portions cooperating with the impeller aforesaid and a casing, forming part of the delivery chamber, inclosing the motor rotor and stator parts.

3. In combination, a rotor adapted to permit liquid to enter it from botliends, centrifugal impeller blades in communication with the rotor intermediate of its length, armature core parts disposed at opposite sides of the impellerblades, a casing surrounding the rotor and formed with a delivery chamber coperating with the im peller blades, and motor stator portions motor parts,

within said casing, at opposite sides of the delivery chamber associated with the armature core parts. y 4t. In combination, a rotor having longitudinally arranged passages open at their ends' to permit entry of liquid, lateral openings intermediate the length ofthe rotor constituting liquid outlets, impeller blades in communication with such outlets, a casing surrounding the rotor and having` a delivery chamber, companion to the impeller blades, side walls extending from the delivery chamber and along the sides of said blades, an armature core portion at each side of the impellerA secured upon the rotor and companion stator portions mounted at each side of the deliverychamber, within said casing.

5. In combination, a rotor adapted to permit liquid to enter it from both ends, longitudinally separated armature parts thereon, a pump impeller intermediate of said armature parts, a combined motor and pump stator associated with the said rotor, armature parts and impeller, and end plates for such casing having inlet openings adapted to permit entry of liquid to the hollow rotor.

G. In combination, a rotor adapted to per,- mit liquid toenter it from bot-l1 ends, longitudinally separated armature parts thereon, a pump impeller intermediateof said `arma ture parts, a combined motor and pu'mp stator associated with the said rotor, armature parts and impeller, end plates for such casing having inlet openings adapted to permit entry -of liquid to the hollow rotor, and

means forming 'a joint between the rotor and end plates 'adapted to prevent solid matter gaining access to the motor stator and armaand a centrifugal pump intermediate of said parts, the said pump having its interior in communication with the interior of the casing; for the purpose described.

8. In combination, a centrifugal pump electric motor elements at opposite sides ci the said pump, a casing extending from the pump to inclose'the motor elements, end plates for said casing, and pipe connections for conducting liquid through the end plates to the interior of the casing.

9. In combination, a centrifugal pump, electric motor elements at opposite sides of the said pump, a casing extending from thepump to inclose the motor elements, end plates for said casing, pipe connections for conducting liquid through the end plates to the interior of the casing and filtering means protecting the out-let ends of the said pipe connections, for the purpose described.

l0. In a combined electric motor and pump, a rotor, an impeller intermediate the length of the rotor, armature core parts disposed at each side of the impeller upon the rotor and conductors common to both armature parts,.extending across the gap between said core parts.

1].. In a combined electric motor and pump, a .rotor having longitudinal liquid conveying passages constituted .by arms therein, formed with curved liquid collecting extremities, an' impeller intermediate of the rotor in'communication with such passages and motor armature parts disposed at opposite sides of said impeller.

Signed at 49 Queen Victoria street, London` E. C. this twentieth day of December 'WILLIAM RICHARD MACDONALD.'

Witnesses:

VALmo VILLEY, C. HICKMAN. 

